Volcano Types
A hole or crack in the outer layer of Earth's crust that allows hot lave, volcanic ash, and gases to escape from below the surface.
What is a volcano?
Scale that was used in the past but has been replaced with the Moment Magnitude Scale.
What is the Richter scale?
Molten rock that flows from a volcano or any other opening in the Earth's crust.
What is lava?
What are seismographs?
Lava that is thick and viscous.
What is blocky lava?
Large, steep-sided, symmetrical cones of built of alternating layers of lava flows, volcanic ash, and cinders.
What is a composite or stratovolcano?
The study of earthquake waves.
What is seismology?
The blacksmith of where the word volcanology comes from.
Who is Vulcan, God of Fire?
Printed records of amplified, electronically recorded ground motion made by seismographs.
What are seismograms?
Word used to describe thinness or thickness.
What is viscosity?
Particles and blobs of solidified lava erupting from a single vent, which breaks into small fragments around the vent creating a cone shape.
What is a cinder cone?
Fractures in Earth where movement has occurred.
What are faults?
Main component of volcanic eruption emmisions.
What is gas?
The first of three waves because it has the greatest velocity and can travel through solids, liquids, and gases.
What are P-waves?
The Hawaiian name for free flowing lava.
What is Pahoehoe lava?
Lava pours in all directions from a vent, building a broad, flat cone of lava. Also consist of hardened-lava dipping sheets.
What is a shield volcano?
The point within the Earth where the earthquake starts.
What is the focus?
Type of eruption where lava oozes out slowly.
What is an effusive eruption?
Seismic waves that travel along Earth's surface and are the most destructive.
What are surface waves?
The Hawaiian name for spikey lava.
What is A'a lava?
When such a large volume of lava is ejected from a volcano that the ground collapses into the empty space creating a bowl.
What is a caldera?
The vibration of Earth produced by the rapid release of energy due to stress between tectonic plates.
What is an earthquake?
Airborne particles of rock and ash produced by an explosive volcanic eruption. Commonly deposits as a blanket over the ground.
What is tephra?
Form of measurement that measures the shaking in a certain location.
What is intensity?
Type of lava that is cooler, high in silica, and has a high vicosity.
What is rhyolitic lava?